1)   AJC Directory Synchronizer 2.4.9
AJC Directory Synchronizer makes it easy to synchronize files and compare folders between any two locations. Synchronize large numbers of files between computers, sync laptop to desktop, mirror to backup drive, sync mp3 player etc.
directory, folder, file, compare, synchronise, synchronize, diff, compare folders, compare directories, compare files,

 2)   VData 2.3
This purpose of this program is verify/compare data. A single file may be compared with another single file. An entire disk or disk structure (folder with files and nested folders) may be compared with a copy on the same or a different device
verify data, compare data, compare files, compare folders, compare disks, compare, files, folders, disks,

 3)   Comparator Fast 1.0.0.19
Simplifies the comparison / verification / synchronization status of two different directories on any media (local drives, network drives, writable CD's, Compact Flash and electronic media, any drive/disk or device managed as valid windows pathnames)
duplicate file, synchronize files, synchronize folders, compare files, file compare, backup tools, compare folders, foldermatch, synchronize computers, duplicate file,